Radiation image capturing system

• US 7,847,277 B2
• Filed: 07/30/2008
• Issued: 12/07/2010
• Est. Priority Date: 07/30/2007
• Status: Active Grant

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: Iriuchijima, Makoto, Kito, Eiichi, Yoshimi, Takuya, Tanabe, Tsuyoshi, Ohta, Yasunori, Ueta, Kazuharu, Kuwabara, Takeshi
• Primary Examiner(s): Porta; David P
• Assistant Examiner(s): Gaworecki; Mark R
• Application Number:
  US12/182,335
• Publication Number:
  US 20090032745A1
• Time in Patent Office: 860 Days
• Field of Search: 250/370.08, 250/370.09, 250/580, 250/581, 250/582, 250/583, 250/584, 378/98.8, 378/189
• US Class Current: 250/580
• CPC Class Codes: A61B 2562/085 combined with means for recording calibration data
• CPC Class Codes: A61B 6/00 Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment instruments measuring radiation intensity for application in the field of nuclear medicine, e.g. in vivo counting, G01T1/161; apparatus for taking X-ray photographs G03B42/02
• CPC Class Codes: A61B 6/4233 using matrix detectors
• CPC Class Codes: A61B 6/4423 related to hygiene or sterilisation
• CPC Class Codes: A61B 6/4488 Means for cooling A61B6/045 takes precedence
• CPC Class Codes: A61B 6/585 Calibration of detector units

Abstract

A transceiver of a radiation detecting cassette sends cassette ID information stored in a cassette ID memory to a transceiver of a console via a transceiver of an image capturing apparatus by way of wireless communications. An ID determining unit determines whether cassette ID information which matches the cassette ID information received by the transceiver is stored in a cassette ID memory or not. If the ID determining unit judges that both cassette ID information match each other, the transceiver sends the cassette ID information and an activation instruction signal to the transceiver by way of wireless communications.

Claims

1. A radiation image capturing system comprising:

a radiation source for outputting a radiation;

a radiation detecting cassette housing therein a radiation conversion panel for detecting the radiation that has emitted from said radiation source and passed through a subject, and converting the detected radiation into radiation image information;

a controller for controlling said radiation source and said radiation detecting cassette,

said radiation detecting cassette further comprising a first ID storage for storing cassette ID information for identifying said radiation detecting cassette and a first wireless communication unit; and

an image capturing apparatus housing said radiation source therein and including a second wireless communication unit for performing wireless communication with said first wireless communication unit,

said controller comprising a second ID storage for storing a plurality of pieces of cassette ID information and an ID determining unit,

wherein said first wireless communication unit sends said cassette ID information stored by said first ID storage to said second wireless communication unit way of wireless communications;

said image capturing apparatus transfers said cassette ID information received by said second wireless communication unit to said controller; and

said ID determining unit determines whether cassette ID information which matches the transferred cassette ID information is stored in said second ID storage or not.

2. A radiation image capturing system according to claim 1, wherein said radiation detecting cassette further includes an ID checker, and said controller further includes a third wireless communication unit;

if said ID determining unit judges that cassette ID information which matches the transferred cassette ID information is stored in said second ID storage, said controller sends the determined cassette ID information from said third wireless communication unit to said first wireless communication unit by way of wireless communications or transfers the determined cassette ID information to said image capturing apparatus from which the determined cassette ID information is sent from said second wireless communication unit to said first wireless communication unit by way of wireless communications; and

said ID checker checks the cassette ID information received by said first wireless communication unit the cassette ID information stored in said first ID storage.

3. A radiation image capturing system according to claim 2, wherein said radiation detecting cassette further includes a battery;

said controller sends the determined cassette ID information and an activation instruction signal for activating said radiation conversion panel from said third wireless communication unit to said first wireless communication unit by way of wireless communications, or transfers the determined cassette ID information and said activation instruction signal to said image capturing apparatus from which the determined cassette ID information and the activation instruction signal are sent from said second wireless communication unit to said first wireless communication unit by way of wireless communications; and

said ID checker checks the cassette ID information received by said first wireless communication unit against the cassette ID information stored in said first ID storage, and controls said battery to activate said radiation conversion panel based on said activation instruction signal if both pieces of the cassette ID information match each other.

4. A radiation image capturing system according to claim 3, wherein if said ID checker judges that both pieces of the cassette ID information match each other, said first wireless communication unit sends a response signal indicating that both pieces of the cassette ID information match each other to said second wireless communication unit or said third wireless communication unit by way of wireless communications;

and

said controller sends image capturing conditions of said subject to said image capturing apparatus based on said response signal which is received by said third wireless communication unit or received by said second wireless communication unit and transferred to said controller.

5. A radiation image capturing system according to claim 2, wherein said first wireless communication unit, said second wireless communication unit, and said third wireless communication unit are capable of UWB wireless communications with each other.

6. A radiation image capturing system according to claim 1, further comprising:

a distance detecting unit for detecting the distance between said radiation source and said radiation detecting cassette;

wherein when said second wireless communication unit receives cassette ID information from a plurality of said first wireless communication unit of a plurality of radiation detecting cassettes, said distance detecting unit detects the distances between said radiation source and said respective radiation detecting cassettes; and

said controller includes a distance determining unit for determining the radiation detecting cassette which is disposed at a shortest one of the distances detected by said distance detecting unit from said radiation source.

7. A radiation image capturing system according to claim 6, wherein said distance detecting unit comprises:

a signal generator disposed in said radiation detecting cassette, for generating a signal;

a signal detector disposed in said image capturing apparatus, for detecting the signal sent from said signal generator; and

a distance calculator disposed in said image capturing apparatus, for calculating said distance based on the signal detected by said signal detector.

8. A radiation image capturing system according to claim 7, wherein said distance detecting unit detects said distance using magnetism;

said signal generator comprises at least three magnets or magnetic generators disposed in said radiation detecting cassette;

said signal detector comprises a three-axis magnetic field sensor for detecting magnetic fields generated by said magnets or magnetic generators; and

said distance calculator calculates said distance based on the magnetic fields detected by said three-axis magnetic field sensor.

9. A radiation image capturing system according to claim 7, wherein said distance detecting unit detects said distance using an ultrasonic wave;

said signal generator comprises an ultrasonic wave reflector disposed in said radiation detecting cassette;

said signal detector comprises an ultrasonic wave transceiver for emitting an ultrasonic wave toward said ultrasonic wave reflector and receiving an ultrasonic wave reflected by said ultrasonic wave reflector; and

said distance calculator calculates said distance based on a period of time consumed after said ultrasonic wave transceiver emits the ultrasonic wave and until said ultrasonic wave transceiver receives the reflected ultrasonic wave.

10. A radiation image capturing system according to claim 7, wherein said distance detecting unit detects said distance using wireless transmissions;

said signal generator comprises a wireless signal transmitter disposed in said radiation detecting cassette;

said signal detector comprises a wireless signal receiver for receiving a wireless signal transmitted by said wireless transmitter; and

said distance calculator calculates said distance based on a period of time consumed after said wireless signal transmitter sends the wireless signal and until said wireless signal receiver receives the wireless signal from said wireless signal transmitter.

11. A radiation image capturing system according to claim 7, wherein said distance detecting unit detects said distance using wireless transmissions;

said signal generator comprises a wireless signal reflector disposed in said radiation detecting cassette;

said signal detector comprises a wireless signal transceiver for emitting a radio wave toward said wireless signal reflector and receiving a radio wave reflected by said wireless signal reflector; and

said distance calculator calculates said distance based on a period of time consumed after said wireless signal transceiver emits the radio wave and until said wireless signal transceiver receives the reflected radio wave.

12. A radiation image capturing system according to claim 10, wherein said distance detecting unit comprises a UWB pulse radar for transmitting and receiving UWB wireless signals.

13. A radiation image capturing system according to claim 7, wherein said signal generator comprises a composite sensor, comprising a geomagnetic sensor, a gravitational sensor, and a three-dimensional gyroscope, disposed in said radiation detecting cassette;

said gravitational sensor outputs the gravitational acceleration of the radiation detecting cassette;

said geomagnetic sensor outputs the direction of geomagnetism;

said three-dimensional gyroscope outputs the attitude of the radiation detecting cassette;

said signal detector detects a detected signal from said signal generator, which represents the gravitational acceleration, the direction of geomagnetism, and the attitude; and

said distance calculator calculates said distance based on the detected signal.

14. A radiation image capturing system according to claim 6, wherein said radiation detecting cassette further includes a display unit;

if said distance determining unit determines one of said radiation detecting cassettes which is disposed in the shortest distance from said radiation source;

said controller sends an indication instruction signal for indicating the position of the radiation detecting cassette in the shortest distance from said third wireless communication unit to said first wireless communication unit of the radiation detecting cassette in the shortest distance by way of wireless communications, or transfers the indication instruction signal to said image capturing apparatus from which the indication instruction signal is sent from said second wireless communication unit to said first wireless communication unit of the radiation detecting cassette in the shortest distance by way of wireless communications; and

said display unit indicates the position of the radiation detecting cassette in the shortest distance based on the indication instruction signal received by said first wireless communication unit.

15. A radiation image capturing system according to claim 1, wherein said second wireless communication unit comprises an antenna having a directivity along the direction in which said radiation is applied.

16. A radiation image capturing system according to claim 1, wherein said first wireless communication unit comprises an antenna having a variable directivity.